Can sound be weighed?

You
might have seen ships floating over water. Can you imagine a steel ball
floating? Yes, if it is having a property called antigravity; they will float
even if they are massive.

You surely
enjoy the waves of great music of A. R. Rahman reaching your ears. Do you
believe the sound contains particles as well as waves? The particle of sound is
called phonon, as we call the particle of light as photon.

The
researchersfrom Columbia Universityhas shown that phonons, like material
particles, have mass! And more specifically, negative mass!! When
acted upon by gravity, they move in the opposite direction, as done by material
particles. This means “steel balls float” in a fluid.

The
researchers assume that sound waves will bend away from massive neutron stars,
if their predictions are correct. This also could mean that sound plays a role
in the behaviour of stars in the sky!